From: Robert Hancock <hancockrwd@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: bzolnier@gmail.com, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, linux-usb@vger.kernel.org
Subject: Re: [RFC PATCH] fix problems with NETIF_F_HIGHDMA in networking drivers
Date: Sat, 27 Feb 2010 12:15:19 -0600 [thread overview]
Message-ID: <51f3faa71002271015i7c9ec45j18381b1269bfd799@mail.gmail.com> (raw)
In-Reply-To: <20100227.040502.182574085.davem@davemloft.net>
On Sat, Feb 27, 2010 at 6:05 AM, David Miller <davem@davemloft.net> wrote:
> From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
> Date: Sat, 27 Feb 2010 12:59:31 +0100
>
>> Having IOMMU (even if it is only a software one, i.e. this would
>> mean swiotlb for x86-32/highmem) always in place would simplify
>> things greatly..
>
> I agree, things would be a lot simpler.
Yeah, the situation kind of sucks on the platforms that don't have any
IOMMU support, since it means that the DMA API can't handle anything
over 4GB properly and you need all these hacks in the block layer,
networking layer, etc. It would be nice if some kind of IOMMU support
could be relied upon always.
WARNING: multiple messages have this Message-ID (diff)
From: Robert Hancock <hancockrwd@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: bzolnier@gmail.com, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, linux-usb@vger.kernel.org
Subject: Re: [RFC PATCH] fix problems with NETIF_F_HIGHDMA in networking drivers
Date: Sat, 27 Feb 2010 12:15:19 -0600 [thread overview]
Message-ID: <51f3faa71002271015i7c9ec45j18381b1269bfd799@mail.gmail.com> (raw)
In-Reply-To: <20100227.040502.182574085.davem@davemloft.net>
On Sat, Feb 27, 2010 at 6:05 AM, David Miller <davem@davemloft.net> wrote:
> From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
> Date: Sat, 27 Feb 2010 12:59:31 +0100
>
>> Having IOMMU (even if it is only a software one, i.e. this would
>> mean swiotlb for x86-32/highmem) always in place would simplify
>> things greatly..
>
> I agree, things would be a lot simpler.
Yeah, the situation kind of sucks on the platforms that don't have any
IOMMU support, since it means that the DMA API can't handle anything
over 4GB properly and you need all these hacks in the block layer,
networking layer, etc. It would be nice if some kind of IOMMU support
could be relied upon always.
next prev parent reply other threads:[~2010-02-27 18:15 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-23 2:45 [RFC PATCH] fix problems with NETIF_F_HIGHDMA in networking drivers Robert Hancock
2010-02-26 9:36 ` David Miller
2010-02-26 14:46 ` Robert Hancock
2010-02-26 14:46 ` Robert Hancock
2010-02-26 15:25 ` Bartlomiej Zolnierkiewicz
2010-02-27 3:08 ` Robert Hancock
2010-02-27 3:08 ` Robert Hancock
2010-02-27 9:53 ` David Miller
2010-02-27 11:59 ` Bartlomiej Zolnierkiewicz
2010-02-27 12:05 ` David Miller
2010-02-27 18:15 ` Robert Hancock [this message]
2010-02-27 18:15 ` Robert Hancock
2010-02-27 18:38 ` FUJITA Tomonori
2010-02-27 18:38 ` FUJITA Tomonori
2010-02-28 8:16 ` David Miller
2010-02-28 8:16 ` David Miller
2010-03-01 16:34 ` Was: Re: [RFC PATCH] fix problems with NETIF_F_HIGHDMA in networking, Now: SWIOTLB dynamic allocation Konrad Rzeszutek Wilk
2010-03-01 21:12 ` Robert Hancock
2010-03-01 21:12 ` Robert Hancock
2010-03-02 4:40 ` FUJITA Tomonori
2010-03-02 4:40 ` FUJITA Tomonori
2010-03-02 4:40 ` FUJITA Tomonori
2010-02-27 17:59 ` [RFC PATCH] fix problems with NETIF_F_HIGHDMA in networking drivers Robert Hancock
2010-02-27 17:59 ` Robert Hancock
2010-02-27 18:38 ` FUJITA Tomonori
2010-02-27 18:38 ` FUJITA Tomonori
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